john brennan defended president obama's counterterrorism policies. >>> a deal is in the work that could create the world's largest airline. mary ann rafferty has details. >> reporter: there is tuck of a merger between airlines. it would become the world's largest anterior line by passenger traffic. some analysts say that might not be enough to save american airlines whose parent company filed for bankruptcy in november 2011. >> don't get too misled by size. a brontosaurus was really large at one time but didn't do very good. >> reporter: american airlines ceo will likely move to a seat on the board of directors. u.s. airways ceo is expected to run the new airline. customer may not be so lucky. >> people's wallets right now tell exactly how much they will pay for tickets right now. long-term, we'll pay more for our ticket prices. >> one airline traveler suggests there are always other options. >> i think that southwest and jetblue will continue to undercut them where price and even some services are concerned. >> sources say the merger negotiations remain fluid and could fall apart. in n